Best overall
Honda EU2200i
2,200W start · 1,800W run
Gasoline · Inverter · 48–57 dBA · 47 lb
The benchmark quiet inverter — legendary engine reliability and clean power (<3% THD) for sensitive electronics.
Find on AmazonWhat size generator for a 1,000 sq ft home?
Short answer
To keep the essentials running in a 1,000 sq ft home during an outage you need a generator rated for at least 3,350 starting watts — about 1,800 running watts for a fridge, heating/cooling, pumps and lights, plus the furnace blower fan's startup surge. A 3,500W (recreational / portable) unit gives comfortable headroom. Size it by the appliances you actually need, not by square footage.
Running watts
1,800W
Peak (surge)
3,350W
Minimum generator
3,350W
Recommended
3,500W
Sizing a generator for a 1,000 sq ft home
Square footage on its own doesn't tell you a generator size — a 1,000 sq ft home with gas heat and city water draws far less than the same area with an electric furnace and a well pump. What actually sets the size is the outage load: the blower fan, any pump, a window AC, the fridge and your lights. This page sizes a realistic essentials set for a home this size.
These essentials draw about 1,800 running wattstogether. You don't add every appliance's starting watts, though — only one motor surges at a time, so the generator only has to cover that running total plus the single largest startup surge (the furnace blower fan's), which brings the peak to 3,350 watts.
To power the whole set, choose a generator rated for at least 3,350 starting watts. A 3,500W unit leaves comfortable headroom to add more — the calculator below does that math for your exact list.
Essentials wattage breakdown
| Appliance | Running watts | Starting watts |
|---|---|---|
| Refrigerator / Freezer | 700W | 2,200W |
| Furnace Blower Fan (1/2 HP) | 800W | 2,350W |
| LED Light Bulb (each) ×6 | 90W | 90W |
| WiFi Router / Modem | 20W | 20W |
| Phone / Device Charger ×2 | 40W | 40W |
| LED TV (up to 55") | 150W | 150W |
Size your own list
This page sizes a typical essentials set for a 1,000 sq ft home. Open the calculator with them pre-selected, then add or remove anything to match your home exactly.
Size a generator for a 1,000 sq ft homeRelated
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Find on AmazonFrequently asked questions
What size generator do I need for a 1,000 sq ft home?
There's no single answer from square footage alone — it depends on what you run during an outage. For the essentials in a 1,000 sq ft home (fridge, heating/cooling, pumps, lights and device charging) you need a generator rated for at least 3,350 starting watts. We recommend a 3,500W (recreational / portable) unit so you have headroom without running it at its limit.
Can a portable generator power a 1,000 sq ft home?
Yes, for the essentials — not for running every circuit at once. A 3,500W portable covers the outage basics this page sizes (about 1,800 running watts, peaking at 3,350W). Powering central AC, an electric range and an electric dryer simultaneously would instead call for a home standby unit spec'd by an electrician.
Why size a generator by appliances instead of square footage?
Because two homes of the same size can have completely different electrical loads — gas vs. electric heat, well pump vs. city water, central vs. window AC. Square footage is only a rough proxy; the honest number comes from adding up the specific appliances you need, which is exactly what this page and the calculator do.